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Dravite and Verdite Optical Properties


Verdite and Dravite Optical Properties


Optical Properties

Luster
Vitreous  
Vitreous, Silky  

Pleochroism
Very strong: pale yellow colorless  
Extreme  

Dispersion
0.02  
99+
0.03  
99+

Transparency
Transparent  
Translucent  

Refractive Index
1.614-1.666  
1.580  

Optic Character
-  
-  

Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m  
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c  

Birefringence
0.014-0.032  
-9999  

Clarity
Transparent  
Translucent  

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Dravite and Verdite Optic Character

Dravite and Verdite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Dravite and Verdite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Dravite and Verdite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Dravite and Verdite Transparency

Similar to their colors, Dravite and Verdite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Dravite is Transparent while Dravite is Transparent in appearance.

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